package ORG.csmz;

class Animal{
    public.void.speak(){
        System.out.println("动物发出叫声");
    }
}
class DOg extends Animal{
    public void speak(){
        System.out.println("狗发出汪汪的叫声");
    }
}
class Cat extends Animal{
    public void speak(){
        System.out.println("猫发出喵喵的叫声");
    }
}
public class Example02 {
    public static void main(String[] args){
        Animal animal =new Animal();
        animal.speak();
        Dog dog =new Dog();
        dog.speak();
        Cat cat=new Cat();
        cat.speak();
    }
}
